We began updating the NOvA target system for 1-Mega Watt (1-MW) beam operation in 2017.
Major changes include maintaining the quality of neutrino beams with reliable instrumentation,
reducing instantaneous beam heating on the target, increasing cooling power to handle the high
power beam, and controlling tritium water production rate. We successfully achieved a onehour
beam power report of 1.018 MW in Summer 2024. This achievement marks an important
milestone for Fermilab, demonstrating the capability of the accelerator complex to handle highintensity
proton beams at a fast repetition rate. We are now prepared to proceed with a new
accelerator upgrade plan, known as the Accelerator Complex Evolution - Main Injector Ramp and
Targetry R&D (ACE-MIRT) to support future operates at beam power exceeding 2 MW for the
Long Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE).
We present the improvement of the target system to exceed the beam power 1-MW.